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  1. #1

    Question Battery charging system issue - 2004 GTX SeaDoo

    Hi,


    I am having issue with my charging system on 2004 GTX Supercharged. About 2 years ago the dashboard was beeping with red light, it says "Low Voltage". I have done research on the web and found a solution. I have bought a brand new OEM Rectifier Voltage Regulator. That have solved my issue until last summer.

    The red light came on again, I figured the battery may be bad. I have replace the battery called MotorBatt from local store.I have use trigger charge over 5 days. I still get red light after riding about 2 hours. I have bought another brand new OEM Rectifier Voltage Regulator, but that did not help this time.

    My jet ski is perfectly good shape. This past summer I've had supercharged rebuilt and it ran awesome except the battery won't hold the charge.

    Is there any other way I can try to solve before I take to the shop for repairing?

    Thank you,
    Robert

  2. #2
    canuck's Avatar
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    What's the battery voltage when the ski is running ?

    Have you checked the alternator connector near the throttle body these like to overheat.
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  3. #3
    Hi Cancuck,

    Thank you for quick response. I would not know how to read the voltage while running. I’d like to learn so if you don’t mind tell me how to. I have not check the connector near the throttle, but I will as soon as I take the jet ski out of my dad’s garage this spring. Thank you for your advice. I will let you know what I find. Much appreciated.

    Robert

  4. #4
    canuck's Avatar
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    Get a multi meter and measure the voltage at the battery terminals before you start the machine then measure again when it's running. A fully charged battery with no load should be 12 to 13V when running it should be around 14 to 14.5V. If the voltage is not higher when running there is a problem with the charging system, alternator, regulator/rectifier or poor connection in the circuit.

    If you get the 12V low after riding for a few hours it sounds like the battery is not charging. I would check the wiring connector as mentioned previously it has three yellow wires in and out this is the alternator output to the regulator/rectifier unit that you have already replaced. A poor battery will put additional load on the alternator which causes the connector to get hot and start to fail.

  5. #5
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    I'd bet a lunch that it's the alternator connector. Seen that way too many times on older skis.

    btw, the connector itself and be removed. do a good job on your splice SOLDER and seal and you're good.

    the guy that has to pull the engine at some point will look, laugh and go back to the toolbox for the big wire cutters

    I've rarely serviced a pre-2006 ski that hadn't had that done already

    and as stated, a new battery is worth is weight in weekend fun.

    My suggestion is a DEKA AGM. Pricey comparatively, until you lose that perfect weekend.

  6. #6

    Wires inspected

    Hi,

    I've bought out jet ski and inspected the wires per your suggested. See attached photos they look good no burning marks. I do not have voltage tester. My buddy will bring one over soon and we will test the voltage and go from there. Removing alternator look like a huge job. I would have to remove supercharged and then reach alternator if that it is issue right. Otherwise tell me where else I can check.

    Thank you


    Quote Originally Posted by canuck View Post
    What's the battery voltage when the ski is running ?

    Have you checked the alternator connector near the throttle body these like to overheat.
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  7. #7
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    looks good. voltmeter next.

    removing the stator ( that's what its called on a pwc) is a pretty big job. engine had to come out or you have to be very very skinny.

    lets hope its the battery itself, or perhaps just a bad regulator ( happens) could be the wiring that attaches to the engine block.

    a voltmeter is key for the next step follow good advice from post#4

    I forgot to mention that you have to come to NM to collect lunch btw...

  8. #8
    This past Sunday my buddy have bought over multi-reader device and the voltage have not gone above 12.84 v during running. Definitely this is my problem, however we tested for continuity with two end connectors that carry 3 yellow wires from rectifier to cantor. We found two wires not beeping other word no connection. Only 1 has good connection. Would that be an issue to why the voltage have not reach above 12.84. I was thinking of buying new set of wires and run across outside and see what happen. Please advise.

    Thank you.

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  9. #9
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    Quote Originally Posted by bicent56 View Post
    This past Sunday my buddy have bought over multi-reader device and the voltage have not gone above 12.84 v during running. Definitely this is my problem, however we tested for continuity with two end connectors that carry 3 yellow wires from rectifier to cantor. We found two wires not beeping other word no connection. Only 1 has good connection. Would that be an issue to why the voltage have not reach above 12.84. I was thinking of buying new set of wires and run across outside and see what happen. Please advise.

    Thank you.

    Good diagnostic!

    Make a new set of connections from the stator direct to the regulator

    That should solve the problem

    Use best soldering practices and wire splice methods and heatshrink tubing for this work

    You need solid waterproof connections here

  10. #10
    Got Boost? psycho rxp's Avatar
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    Also double check the 2) 30A fuses on the side of the MPEM for blown , or melting

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